Altair Glide Computer and Navigation System User Manual Page 30
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3 DISPLAY ELEMENTS
3.4 Trail
An optional trail is drawn on the map showing the glider’s path history. The colour and thickness of
the trail depends on the variometer value; with lift areas being presented in green and thicker lines,
sink areas being presented in red with thin lines. Zero lift is presented as a grey line.
If Vega or an intelligent variometer is connected with Netto output, the Netto vario value is used;
hence the colours and thickness of the trail indicates the air-mass vertical movement rather than
the glider’s vertical movement.
The trail display can be toggled between off, short (about ten minutes), long (about one hour) or
full (entire flight). This can be performed through the configuration settings or by the menu:
DISP Setup Display
The trail width can be adjusted in the configuration settings (see 11.3).
Note that for each of these modes, the trail is short in circling mode in order to reduce screen
clutter.
In order to assist centering thermals in the presence of wind, the trail can be artificially drifted with
the wind as it is displayed (drift compensation). In this way, the trail is referenced to the prevailing
wind rather than referenced to the ground. Since thermals drift with the wind also, the drifted trails
give a better indication of where the glider has been relative to the thermals.
An example of this is illustrated below. Note that when trail drift compensation is active (right
picture), the glider appears to be circling in a column rather than an elongated spiral (left picture).
Enabling trail drift compensation is performed through the configuration settings. The compensa-
tion is only performed whilst in circling mode; the display of the trail in cruise mode is unaffected.
This can also be performed from the wind settings dialog:
23 XCSoar Manual (Altair version) • XCSoar-A-EN
- Manual (Altair version) 1
- Revision history 3
- Warnings and precautions 3
- Legal notices 3
- Contents 4
- • XCSoar-A-EN iv 5
- • XCSoar-A-EN vi 7
- 1 Introduction 8
- Start-up and user profiles 9
- Splash screen 9
- 1.4 Through-life support 10
- 1.5 Using XCSoar safely 11
- 2 User Interface 12
- 2.1 Button labels and menus 13
- 2.1.1 NAV menu 14
- 2.1.2 DISP menu 15
- 2.1.3 Pan mode 15
- 2.1.4 CONF menu 16
- 2.1.5 INFO Menu 16
- Default buttons 17
- Dynamic menu labels 17
- 2.2 InfoBoxes 18
- 2.3 Dialog windows 18
- • XCSoar-A-EN 12 19
- 2.3.7 Screen Brightness 20
- 2.3.8 Setup MacCready 20
- 2.3.9 Basic Settings 20
- 2.3.10 Wind Settings 20
- • XCSoar-A-EN 14 21
- 2.4 Status messages 22
- 2.5 Status dialog 22
- Aircraft 23
- • XCSoar-A-EN 18 25
- 2.6 Text entry 26
- 2.7 Sounds 27
- 2.8 Screen 27
- 2.9 Help system 27
- 3 Display Elements 28
- 3.3 Glider symbol 29
- 3.4 Trail 30
- 3.5 Glide range 31
- 3.6 Map elements 31
- Waypoints 32
- Terrain and topology 32
- 3.7 Markers 33
- 3.8 Active task elements 33
- 3.9 Thermal profile 34
- 3.10 Other 34
- GPS not connected 35
- GPS waiting for fix 35
- Final glide 35
- 4 Cross Country Tasks 36
- • XCSoar-A-EN 30 37
- 4.2 Task Editor 38
- • Save only Only save task 39
- • Task type Standard or AAT 40
- • Distance Task distance 40
- • XCSoar-A-EN 34 41
- Page: Waypoints 42
- • XCSoar-A-EN 36 43
- Page: Rules 44
- 4.3 Task calculator 45
- 4.4 Waypoint Browser 46
- 4.5 Waypoint Info 47
- −100%, the target is located 48
- 4.7 OnLine Contest 49
- 4.8 Logger 50
- Setup Logger 51
- 5 Glide Computer 52
- 5.2 MacCready settings 53
- 5.3 Glide polar 54
- 5.4 Basic settings 55
- 5.5 Speed to fly 56
- 5.6 Safety heights 57
- = 0), adjusted for 58
- 5.7 Final glide calculator 59
- +/− 500 meters 60
- 5.9 Task speed estimation 61
- 5.10 Optimal cruise track 62
- Analysis Show 63
- 5.12 Flight notifications 64
- 5.13 Sunlight and time 64
- 6 Atmosphere and Instruments 65
- 6.2 Air data inputs 66
- 6.3 Wind display 66
- 6.4 Wind estimation 66
- 6.5 Wind settings dialog 67
- 6.6 Thermal locator 68
- 6.7 Convection forecast 69
- • XCSoar-A-EN 64 71
- 7.1 Airspace display 72
- 7.2 Incursion events 73
- 7.3 Airspace warning levels 73
- 7.4 Airspace warning dialog 74
- 7.6 Airspace Info dialog 75
- 7.7 Airspace Browser dialog 76
- • XCSoar-A-EN 70 77
- 7.8 Analysis dialog: Airspace 78
- 7.9 FLARM traffic display 79
- • Green for level 0 80
- • Yellow for level 1 80
- • Red for level 2 and 3 80
- 7.10 Team flying 81
- 8 Avionics and Airframe 82
- 8.3 Switch Status 83
- 8.5 Supported variometers 83
- 8.6 Other avionics devices 84
- 8.7 Slave mode 84
- 9 Quickstart 85
- 9.2 FAI Task 86
- 9.3 FAI Task, Manual Start 87
- 9.4 AAT Task, Manual Arm 87
- In-flight 88
- After landing 89
- Prior to takeoff 90
- 10 InfoBox Reference 91
- 10.3 Glide ratio 92
- 10.4 Variometer 93
- 10.5 Atmosphere 94
- 10.6 MacCready 94
- 10.7 Navigation 95
- 10.8 Waypoint 97
- 10.9 Team code 98
- 11 Configuration 99
- Fail-safe 100
- 11.1 Site 101
- 11.2 Airspace 102
- • XCSoar-A-EN 96 103
- 11.3 Map Display 104
- • XCSoar-A-EN 98 105
- 11.4 Terrain display 106
- Colour schemes 107
- 11.5 Glide computer 108
- • XCSoar-A-EN 102 109
- 11.6 Safety factors 110
- 11.7 Polar 111
- 11.8 Devices 112
- 11.9 Units 113
- 11.10 Interface 114
- 11.11 Appearance 115
- • XCSoar-A-EN 116
- 11.12 InfoBox 117
- 12 Data Files 118
- 12.5 Airspace 119
- 12.6 Map 119
- 12.7 Airfield details 119
- 12.8 Glide polar 120
- *Speed2, Sink2, Speed3, Sink3 121
- • XCSoar-A-EN 116 123
- 12.9 Profiles 125
- 12.10 Checklist 125
- 12.11 Tasks 125
- 12.12 Flight logs 126
- 12.13 Input events 126
- 12.14 Language 126
- 12.15 Status 127
- 12.16 FLARM Identification file 127
- 12.17 Dialog files 127
- 13 About XCSoar 128
- 13.3 Open source philosophy 129
- 13.4 Development process 129
- 13.5 User base 130
- 13.6 Credits 130
- • XCSoar-A-EN 124 131
- A GNU General Public License 132
- • XCSoar-A-EN 126 133
- • XCSoar-A-EN 128 135
- No warranty 136
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